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NetXMS vs OpenNMS: catalog facts
NetXMS	OpenNMS
Freemium The open-source edition is free; enterprise capabilities and services are available…	Freemium Open source core (Horizon) is free, with a paid enterprise edition (Meridian).
Self-hosted	Self-hosted
Collects device and agent data Provides monitoring and management interfaces	Carrier-grade design proven at large enterprise scale Event correlation and Grafana integration for deeper visualization
Enterprise services and editions have separate terms.	Complexity suited to large networks may be overkill for small setups Paid tiers are needed for enterprise support and advanced features
Self-hosted	Self-hosted, Downloadable app
Open source	Open source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.